restore-system-configs.txt

To mount `/home` partition:

    1) format as `ext4`
    2) `lsblk` or `blkid` to get UUID
    3) file: "/etc/fstab"
        # <file_system>                        <mount_point>    <type>  <options>      <dump>  <pass>
        UUID=725df7b9-8c5f-4bfd-bf7e-8e21a62b3341   /           ext4    errors=remount-ro   0   1
        UUID=6646-60D7                              /boot/efi   vfat    umask=0077          0   1
        UUID=36de459c-469a-4d74-9b45-21ff77fbfa72   none        swap    sw                  0   0
        # for home, xz
        UUID=8364cc01-87e5-40d7-95e3-a5f4305bf43f   /home       ext4    defaults,noatime    0   2
    4) Care!! remove any possible interferences before sync, like '.lib', '.config', '.local'
        `rsync -av /home /path/to/mount/folder`



To remove "Music", "Template", "Picture", "VIDEOS" folder:

    for file: "/home/xiang/.config/user-dirs.dirs"
    
        XDG_DESKTOP_DIR="$HOME/Desktop"
        XDG_DOWNLOAD_DIR="$HOME/Downloads"
        XDG_TEMPLATES_DIR="$HOME/Templates"
        XDG_PUBLICSHARE_DIR="$HOME"
        XDG_DOCUMENTS_DIR="$HOME/Documents"
        XDG_MUSIC_DIR="$HOME"
        XDG_PICTURES_DIR="$HOME"
        XDG_VIDEOS_DIR="$HOME"



To add `.desktop`, path: "/home/xiang/.local/share/applications":

    [Desktop Entry]
    Version=1.0
    Name=myapp
    Type=Application
    Exec=/home/xiang/Applications/app/myapp
    Icon=/home/xiang/Applications/app/myicon
    Terminal=false



To add context menu script:
    link: https://help.ubuntu.com/community/NautilusScriptsHowto
    path: "/home/xiang/.local/share/nautilus/scripts"



Be aware, "xxx 'mimeapps.list': Operation not permitted"
    
    >>> lsattr mimiapps.list                    # fuck WPS
    ----i---------e------- mimeapps.list        # means immutable
    >>> chattr -i mimeapps.list
    --------------e------- mimeapps.list



Click to preview:
    >>> gsettings set org.gnome.shell.extensions.dash-to-dock click-action 'previews'
    #>>> gsettings set org.gnome.shell.extensions.dash-to-dock shift-click-action 'previews'
    #>>> gsettings set org.gnome.shell.extensions.dash-to-dock middle-click-action 'previews'
    #>>> gsettings set org.gnome.shell.extensions.dash-to-dock shift-middle-click-action 'previews'